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Electron and hole contributions to normal-state transport in the superconducting system Sn1-x InxTe

Journal Article · · Physical Review B
 [1];  [1];  [2];  [1];  [2];  [2];  [2];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Indium-doped SnTe has been of interest because the system can exhibit both topological sur- face states and bulk superconductivity. While the enhancement of the superconducting transition temperature is established, the character of the electronic states induced by indium doping remains poorly understood. We report a study of magneto-transport in a series of Sn1-xInxTe single crystals with 0:1 ≤ x ≤ 0:45. From measurements of the Hall effect, we find that the dominant carrier type changes from hole-like to electron-like at x ~ 0:25; one would expect electron-like carriers if the In ions have a valence of +3. For single crystals with x = 0:45, corresponding to the highest super- conducting transition temperature, pronounced Shubnikov-de Haas oscillations are observed in the normal state. In measurements of magnetoresistance, we nd evidence for weak anti-localization (WAL). We attribute both the quantum oscillations and the WAL to bulk Dirac-like hole pockets, previously observed in photoemission studies, which coexist with the dominant electron-like carriers.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0012704
OSTI ID:
1466623
Alternate ID(s):
OSTI ID: 1463759
Report Number(s):
BNL--207980-2018-JAAM
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 5 Vol. 98; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Superconductivity of Topological Surface States and Strong Proximity Effect in Sn 1− x Pb x Te–Pb Heterostructures journal November 2019
Superconductivity of Topological Surface States and Strong Proximity Effect in Sn 1–x Pb x Te‐Pb Heterostructures journal September 2020
Band structure engineering in Sn 1.03 Te through an In-induced resonant level journal January 2020

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